Self-adaptive unwinding device of gypsum board film laminating machine and unwinding method thereof

Abstract

The application discloses a self-adaptive unwinding device of a gypsum board film laminating machine, which comprises an unwinding roller, a movable roller, an elevator and a brake / motor, the unwinding roller is used for mounting a film roll; the movable roller rotates in parallel to the unwinding roller and has a moving stroke in height, a free end of the film is transmitted to the next station from the film roll through the lower part of the movable roller, before the film roll is started, the elevator lifts the movable roller to the top end of the stroke; when the film roll is started, the elevator releases the movable roller, so that the film under the movable roller is tensioned by the free-fall movable roller, the brake / motor adjusts the brake torque / rotation speed of the unwinding roller according to the position of the movable roller, so that the movable roller is kept at the middle end of the stroke, the film is tensioned at the moment when the film roll is started through the above-mentioned action, and the technical problem that the unwinding speed of the unwinding roller is greater than the use speed of the film, resulting in the relaxation of the film near the unwinding roller at the moment when the film roll is started is effectively eliminated.

Description

TECHNICAL FIELD

[0001] The application relates to the field of gypsum board film covering machines, in particular to a self-adaptive unwinding device of a gypsum board film covering machine.

[0002] The application also relates to an unwinding method of the self-adaptive unwinding device of the gypsum board film covering machine. BACKGROUND

[0003] The gypsum board film covering machine related to the disclosed subject matter is disclosed in Chinese Patent Publication No. CN113715320A, which discloses a gypsum board automatic PVC film pasting device.

[0004] In the film covering machine of the gypsum board, the film roll is installed on the top of the film covering machine through the unwinding roller, the unwinding roller unwinds the film through the active or passive mode, when one film roll is used up, the automatic film splicing device splices the film on another film roll through hot pressing, so that the film covering machine can work continuously.

[0005] The passive unwinding is also called the brake unwinding machine, which utilizes the brake on the unwinding roller to generate resistance torque and generates tension in the film, the tension of the film is monitored by the tension detector, since the diameter of the roll material changes constantly, the brake should be compensated accordingly to maintain constant material tension, when the diameter of the roll material decreases, the brake must gradually reduce the brake torque, and excessive tension may cause the film to stretch or even break.

[0006] Therefore, after the roll material on one unwinding roller is used up and a new roll material is replaced, the brake torque applied to the unwinding roller by the brake is minimum, when the unwinding roller is used again, because the brake torque is too small, the unwinding speed of the film roll is greater than the use speed of the film, the film between the unwinding roller and the tension detector is relaxed, and further, the film appears folding, wrinkling and deviation.

[0007] The active unwinding is also called the drive unwinding machine, the unwinding of the main roller is driven by the motor, the tension of the film is controlled by the dancer roller located behind the unwinding station, the position of the dancer roller is monitored, once it is found that the dancer roller is located outside the middle position, the speed of the unwinding drive motor will be adjusted according to the position of the dancer stick to ensure that the dancer roller is positioned correctly.

[0008] Therefore, after the roll material on one unwinding roller is used up and a new roll material is replaced, the drive speed of the unwinding roller applied by the motor is maximum, when the unwinding roller is used again, because the drive speed is too large, the unwinding speed of the film roll is greater than the use speed of the film, the film between the unwinding roller and the dancer stick is relaxed, and further, the film appears folding, wrinkling and deviation. SUMMARY

[0009] The gypsum board film laminating machine self-adaptive unwinding device aims to solve the technical problem that the film on the unwinding roller of the gypsum board film laminating machine is easy to fold, wrinkle and deviate when the film is just started, which affects the film laminating quality of the gypsum board.

[0010] To solve the above technical problems, the present application specifically provides the following technical solutions:

[0011] The gypsum board film laminating machine self-adaptive unwinding device provided by the present application comprises an unwinding roller, which can rotate around a horizontal axis and is used for mounting a film; a movable roller, which can rotate parallel to the unwinding roller and has a moving stroke in height, and a free end of the film is transmitted to the next station through the lower side of the movable roller from the film; a lifting machine, which has an execution part capable of lifting, and the execution part of the lifting machine is connected with the movable roller, and before the film is started, the lifting machine lifts the movable roller to the top end of the stroke; and a brake, which is used for braking the rotation of the unwinding roller to passively unwind the film, and when the film is started, the lifting machine releases the lifting of the movable roller, so that the film under the movable roller is tensioned by the free-falling movable roller, and the brake adjusts the brake torque of the unwinding roller according to the position of the movable roller, so that the movable roller is kept at the middle end of the stroke; or a motor, which is used for driving the rotation of the unwinding roller to actively unwind the film, and when the film is started, the lifting machine releases the lifting of the movable roller, so that the film under the movable roller is tensioned by the free-falling movable roller, and the motor adjusts the rotation speed of the unwinding roller according to the position of the movable roller, so that the movable roller is kept at the middle end of the stroke.

[0012] Further, a fixed roller is arranged on the side of the movable roller away from the unwinding roller, the fixed roller is parallel to the unwinding roller, the height of the fixed roller is not lower than the maximum height of the unwinding roller, and the film released from the film is transmitted through the movable roller and the fixed roller in sequence.

[0013] Further, the movable roller is slidingly connected with a rack, and the sliding direction is vertically arranged, and the lifting machine is used for driving the movable roller to vertically lift.

[0014] Further, the end of the movable roller is sequentially formed with an axially extending first shaft segment and a second shaft segment, a first bearing is sleeved on the first shaft segment, and a first nut for fixing the first bearing is spirally installed on the second shaft segment; the movable roller is connected with the rack through a sliding table, and the sliding table comprises a sliding rail, which is vertically arranged on the rack; and end covers, which have two and are symmetrical to each other, and the two end covers are tightly connected to form a sliding block for embedding the first bearing and slidingly connecting the sliding rail.

[0015] Further, the end of the second shaft section is sequentially formed with an axially extending third shaft section, a fourth shaft section, a second bearing is sleeved on the third shaft section, and a second nut for fixing the second bearing is spirally installed on the fourth shaft section, and the execution part of the lifting machine is connected with the second bearing.

[0016] Further, the lifting machine comprises a supporting rod comprising a hinged part, a sliding column and a supporting part in sequence, the supporting part is used for supporting the end of the movable roller, a driver with an execution part capable of vertical lifting, the hinged part is hinged with the execution part of the driver, the axis of the hinged part is parallel to the axis of the sliding column, a special-shaped sliding groove is vertically arranged and is in sliding connection with the sliding column, the special-shaped sliding groove is used for changing the horizontal distance between the sliding column and the hinged part during the sliding of the sliding column to make the supporting rod rotate around the hinged part, during the upward movement of the supporting rod, the supporting part is in contact with the end of the movable roller, and during the downward movement of the supporting rod, the supporting part is separated from the end of the movable roller.

[0017] Further, the special-shaped sliding groove comprises a first sliding groove extending along the vertical direction, when the sliding column is connected with the first sliding groove, the supporting part can support the end of the movable roller, a second sliding groove connected with the top end of the first sliding groove and extending downwardly and obliquely towards the execution part of the driver, when the sliding column is connected with the second sliding groove, the supporting rod rotates around the hinged part to make the supporting part move away from the movement track of the movable roller, a third sliding groove connected with the bottom end of the second sliding groove and extending downwardly and obliquely towards the execution part of the driver, the horizontal position of the hinged part is between the bottom end of the first sliding groove and the bottom end of the third sliding groove, a fourth sliding groove connected with the bottom end of the third sliding groove and extending downwardly and obliquely away from the execution part of the driver to the side of the bottom end of the first sliding groove, the horizontal position of the hinged part is between the bottom end of the third sliding groove and the bottom end of the fourth sliding groove, and a fifth sliding groove connected with the bottom end of the fourth sliding groove and the bottom end of the first sliding groove, the fifth sliding groove extends upwardly and obliquely away from the execution part of the driver, the top surface of the fifth sliding groove and the top surface of the fourth sliding groove are located in the same plane, when the sliding column is connected with the fifth sliding groove, the supporting rod rotates around the hinged part to make the supporting part support the end of the movable roller.

[0018] Further, the driver comprises a chain transmission mechanism, the chain of the chain transmission mechanism moves back and forth along the vertical direction, the chain of the chain transmission mechanism is hinged with the hinged part through an accessory, and an electric motor is used for driving the rotation of the chain wheel of the chain transmission mechanism.

[0019] As another aspect of the present application, the movable roller is rotatably connected to the frame through a swing arm, and the swing arm rotation axis is horizontally arranged, and the lifting machine is used to drive the movable roller to perform circumferential motion around the swing arm swing axis.

[0020] The application also provides a film unwinding method of the self-adaptive film unwinding device of the gypsum board film laminating machine, including the following steps: step 1, preparing for film unwinding: an active roller is arranged beside the film unwinding roller, the active roller can rotate parallel to the film unwinding roller and has a moving stroke in height, a film roll is installed on the film unwinding roller, a film is pulled from the film roll and transmitted to the next station through the lower side of the active roller, and the active roller is lifted to the top of the stroke before the film roll is started; then, step 2A, passive film unwinding: a brake is used to brake the rotation of the film unwinding roller to passively unwind the film roll, when the film roll is started, the active roller is released, so that the film under the active roller is tensioned by the free-falling active roller, and the brake adjusts the brake torque of the film unwinding roller according to the position of the active roller, so that the active roller is kept at the middle of the stroke; or step 2B, active film unwinding: a motor is used to drive the rotation of the film unwinding roller to actively unwind the film roll, when the film roll is started, the active roller is released, so that the film under the active roller is tensioned by the free-falling active roller, and the motor adjusts the rotation speed of the film unwinding roller according to the position of the active roller, so that the active roller is kept at the middle of the stroke.

[0021] Compared with the prior art, the application has the following beneficial effects:

[0022] The application provides a self-adaptive film unwinding device of a gypsum board film laminating machine, before the film roll is started, the lifting machine lifts the active roller to the top of the stroke, when the film roll is started, the lifting machine releases the active roller, so that the film under the active roller is tensioned by the free-falling active roller, and the brake / motor adjusts the brake torque / rotation speed of the film unwinding roller according to the position of the active roller, so that the active roller is kept at the middle of the stroke, through the above actions, the film is tensioned at the moment when the film roll is started, and the technical problem that the film unwinding speed of the film unwinding roller is greater than the use speed of the film at the moment when the film roll is started, resulting in that the film near the film unwinding roller is loose, is effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can also be obtained from the provided drawings without creative labor.

[0024] Figure 1 It is a mechanical diagram of the use process of the film roll of the gypsum board film laminating machine;

[0025] Figure 2 This is a simplified mechanical diagram illustrating the use of the roll film according to an embodiment of the present invention.

[0026] Figure 3 This is a simplified mechanical diagram illustrating the situation where one roll of film is used up and another roll of film is activated according to an embodiment of the present invention.

[0027] Figure 4 This is a simplified mechanical diagram of another embodiment of the present invention;

[0028] Figure 5 This is a perspective view of the working state of an embodiment of the present invention;

[0029] Figure 6 This is a perspective view of an embodiment of the present invention;

[0030] Figure 7 for Figure 6 A magnified view of a portion at point A;

[0031] Figure 8 for Figure 7 Assembly drawing of the structure shown;

[0032] Figure 9 This is a perspective view of the end cap according to an embodiment of the present invention;

[0033] Figure 10 This is a perspective view of the hoist according to an embodiment of the present invention;

[0034] Figure 11 for Figure 10 A magnified view of a portion at point B;

[0035] Figure 12 This is a front view of the hoist according to an embodiment of the present invention;

[0036] Figure 13 for Figure 12 A magnified view of a portion at point C;

[0037] Figure 14 for Figure 12 A magnified view of a portion at point D;

[0038] The labels in the diagram represent the following:

[0039] 11-Automatic film splicing machine; 12-Tension detector; 13-Slide rail; 14-Slider; 15-End cap; 151-Through hole; 152-Blind hole; 153-First notch; 154-Second notch;

[0040] 2-Unwinding roller;

[0041] 3-roll film; 31-film;

[0042] 4 - active roller; 41 - first shaft segment; 42 - first bearing; 43 - second shaft segment; 44 - first nut; 45 - third shaft segment; 46 - second bearing; 47 - fourth shaft segment; 48 - second nut;

[0043] 5 - lifting machine; 51 - supporting rod; 511 - hinged part; 512 - slide post; 513 - supporting part; 52 - driver; 521 - chain transmission mechanism; 522 - motor; 53 - special-shaped chute; 531 - first chute; 532 - second chute; 533 - third chute; 534 - fourth chute; 535 - fifth chute;

[0044] 6 - fixed roller;

[0045] 7 - swing arm. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0047] In the gypsum board film laminating machine with the automatic film laminating machine, when the new film roll 3 is just started, the unwinding speed of the film roll 3 is greater than the use speed of the film roll 3, the film is relatively loose, and the folding, wrinkling and deviation phenomenon is prone to occur, which is caused by the fact that the braking torque of the brake for braking the unwinding of the film roll 3 or the rotating speed of the motor for driving the rotation of the film roll 3 cannot be automatically adjusted to a proper size.

[0048] Taking the passive unwinding as an example, Figure 1 The use process of the film roll 3 is shown in the schematic view;

[0049] The torque applied by the film roll 3 to the unwinding roller 2 is T1, T1 = traction force F of the film roll 3 x distance h between the surface of the film roll 3 and the axis of the unwinding roller 2.

[0050] The braking torque applied by the brake to the unwinding roller 2 is T2, in order to enable the film roll 3 to be kept tensioned and stably unwound: T1 = T2 = F x h.

[0051] As shown in Figure 1 (a) and Figure 1 (b), the diameter of the film roll 3 gradually decreases in the use process, resulting in that the distance between the surface of the film roll 3 and the axis of the unwinding roller 2 gradually decreases from h1 to h2, the tension detector detects the tension of the film roll 3, and in order to ensure that the film roll 3 is always properly tensioned, the traction force F of the film roll 3 = the tension of the film roll 3.

[0052] According to the formula T2=F x h, the distance h between the surface of the roll film 3 and the axis of the unwinding roller 2 is constantly reduced, and thus the braking torque T2 applied to the unwinding roller 2 by the brake is also constantly reduced, so as to ensure that the tension of the roll film 3 remains unchanged.

[0053] Figure 1 (c) and Figure 1 (d) shows a process schematic when the old roll film 3 is used up and the new roll film 3 is enabled;

[0054] At this time, the braking torque T2 applied to the unwinding roller 2 by the brake is at a minimum, the distance h3 between the surface of the roll film 3 and the axis of the unwinding roller 2 is at a maximum, the traction force F of the roll film 3 is always unchanged, and the torque T1 applied to the unwinding roller 2 by the roll film 3 is much greater than the braking torque T2 applied to the unwinding roller 2 by the brake.

[0055] T1=F x h3>F x h2=T2.

[0056] The unwinding roller 2 rotates excessively, causing the unwinding speed of the roll film 3 to be greater than the use speed of the film, and the film between the unwinding roller 2 and the tension detector is folded, wrinkled, and offset due to relaxation.

[0057] To solve the technical problems existing in the passive unwinding, the following embodiment 1 is provided.

[0058] An adaptive unwinding device of a gypsum board film coating machine is provided, comprising:

[0059] An unwinding roller 2, which can rotate around a horizontal axis, is used to install a roll film 3;

[0060] A movable roller 4, which can rotate parallel to the unwinding roller 2 and has a moving stroke in height, is used to transmit the free end of the film from the roll film 3 to the next station through the lower part of the movable roller 4;

[0061] A lifting machine 5, which has an executable part that can be lifted, is connected with the movable roller 4, and before the roll film 3 is enabled, the lifting machine 5 lifts the movable roller 4 to the top end of its stroke;

[0062] And:

[0063] A brake, which is used to brake the rotation of the unwinding roller 2 to passively unwind the roll film 3, when the roll film 3 is enabled, the lifting machine 5 releases the lifting of the movable roller 4, so that the film below the movable roller 4 is tensioned by the free-falling movable roller 4, and the brake adjusts the braking torque of the unwinding roller 2 according to the position of the movable roller 4, so that the movable roller 4 is kept at the middle end of its stroke;

[0064] Or,

[0065] Motor, the motor is used to drive the unwinding roller 2 to rotate to actively unwind the film 3, when the film 3 is activated, the elevator 5 releases the lifting of the movable roller 4, so that the film under the movable roller 4 is tensioned by the free falling movable roller 4, the motor adjusts the rotating speed of the unwinding roller 2 according to the position of the movable roller 4, so that the movable roller 4 is kept at the middle end of its stroke.

[0066] As shown in Figure 2 :

[0067] When the film 3 is just activated, the film near the movable roller 4 is loose, at this time the movable roller 4 free falls and tightens the film by its own weight, the position change of the movable roller 4 compensates the looseness of the film caused by the excessive rotation of the unwinding roller 2.

[0068] As shown in Figure 3 :

[0069] In the passive unwinding device, due to the rapid descent of the movable roller 4, the brake torque provided by the brake gradually increases, before the movable roller 4 falls to the bottom end of its stroke, the movable roller 4 stops falling, the brake torque provided by the brake continues to increase until the movable roller 4 returns to the middle end of its stroke.

[0070] In the active unwinding device, due to the rapid descent of the movable roller 4, the rotating speed of the motor gradually slows down, before the movable roller 4 falls to the bottom end of its stroke, the movable roller 4 stops falling, then the rotating speed of the motor continues to slow down until the movable roller 4 returns to the middle end of its stroke.

[0071] On the other hand:

[0072] A kind of unwinding method of self-adapting unwinding device of gypsum board film laminating machine is provided, comprising the following steps:

[0073] Step 1, prepare to unwind:

[0074] A movable roller 4 is arranged beside the unwinding roller 2, the movable roller 4 can rotate parallel to the unwinding roller 2 and has a moving stroke in height, the film 3 is installed on the unwinding roller 2, the film is pulled from the film 3 to transmit to the next station with its free end passing below the movable roller 4, before the film 3 is activated, the movable roller 4 is lifted to the top end of its stroke;

[0075] Then, step 2A, passive unwinding is executed:

[0076] The rotating of the unwinding roller 2 is braked by using the brake to passively unwind the film 3, when the film 3 is activated, the lifting of the movable roller 4 is released, so that the film under the movable roller 4 is tensioned by the free falling movable roller 4, the brake torque of the unwinding roller 2 is adjusted according to the position of the movable roller 4, so that the movable roller 4 is kept at the middle end of its stroke;

[0077] Alternatively, perform step 2B, actively unwind the roll:

[0078] The unwinding roller 2 is driven by a motor to actively unwind the film 3. When the film 3 is in use, the lifting roller 4 is released, so that the film below the roller 4 is tensioned by the freely falling roller 4. The motor adjusts the rotation speed of the unwinding roller 2 according to the position of the roller 4 so that the roller 4 is kept in the middle of its stroke.

[0079] Furthermore:

[0080] Because the height of the workshop is limited, the travel of the movable roller 4 in height is limited. In order to reduce the travel of the movable roller 4, it is necessary to achieve a better tensioning effect with a shorter travel. To achieve this goal...

[0081] A fixed roller 6 is provided on the side of the movable roller 4 away from the unwinding roller 2. The fixed roller 6 is parallel to the unwinding roller 2, and the height of the fixed roller 6 is not lower than the maximum height of the unwinding roller 2. The film released by the film roll 3 is transferred sequentially through the movable roller 4 and the fixed roller 6.

[0082] According to the principle of movable pulleys, when the movable roller 4 moves a distance m in height, the length of the film that is tensioned is equal to 2m.

[0083] Furthermore:

[0084] The movable roller 4 can achieve vertical travel in two different ways.

[0085] like Figure 2 and Figure 3 As shown:

[0086] The movable roller 4 is slidably connected to the frame and the sliding direction is set vertically. The elevator 5 is used to drive the movable roller 4 to move vertically up and down.

[0087] In this embodiment, the elevator 5 includes a cylinder slide and a mechanical claw. The cylinder slide is used to drive the mechanical claw to move vertically up and down, and the mechanical claw is used to grasp or release the movable roller 4.

[0088] The advantage of this embodiment is its compact structure and ease of arrangement. The disadvantage is that it requires two power sources, one for driving the mechanical claw to open and close and the other for lifting.

[0089] Or, such as Figure 4 As shown:

[0090] The movable roller 4 is rotatably connected to the frame via the swing arm 7, and the axis of rotation of the swing arm 7 is set horizontally. The elevator 5 is used to drive the movable roller 4 to perform circular motion around the swing axis of the swing arm 7.

[0091] In this embodiment, the hoist 5 includes a motor, the output shaft of which is connected to one end of the swing arm 7 and is used to drive the other end of the swing arm 7 to swing.

[0092] The advantage of this embodiment is that only one power source is needed to drive the swing arm to swing, and the disadvantage is that a large horizontal gap is needed between the unwinding roller 2 and the fixed roller 6 to facilitate the swing of the movable roller 4.

[0093] The above two embodiments are only examples, and in fact there are more embodiments that can enable the movable roller 4 to have a stroke in height and perform free fall to tension the film, which will not be repeated here.

[0094] When the movable roller 4 is slidingly connected to the frame, as shown in Figures 5-14 , specifically:

[0095] As shown in Figure 7 , 8 ,

[0096] The end of the movable roller 4 is sequentially formed with an axially extending first shaft section and a second shaft section, a first bearing is sleeved on the first shaft section, and a first nut for fixing the first bearing is spirally installed on the second shaft section;

[0097] The movable roller 4 is connected to the frame through a sliding table, and the sliding table comprises:

[0098] A slide rail is vertically arranged on the frame;

[0099] End caps, which are two and symmetrical to each other, are tightly connected to form a sliding block for fitting the first bearing and slidingly connecting the slide rail.

[0100] Specifically:

[0101] The two end caps are connected by bolts, and the end caps are rectangular in shape. The center of the end cap is provided with a through hole which is in clearance fit with the first shaft section. One side of the end cap is coaxially provided with a blind hole which is in conformity with the outer ring of the bearing. Two parallel edges of the end cap are provided with first notches formed on one side of the end cap. The two first notches form a sliding groove for slidingly connecting the slide rail after splicing.

[0102] If the two end caps cannot be aligned perfectly, the splicing part of the two first notches forms a sharp edge that can scratch the slide rail, causing the friction between the sliding block and the slide rail to increase, affecting the free fall of the movable roller 4.

[0103] Therefore, the joint part of the two first notches is formed with a second notch.

[0104] Further:

[0105] In order to avoid the execution part of the lifting machine 5 rubbing against the movable roller 4, causing the rotation of the movable roller 4 to be blocked.

[0106] The end of the second shaft section is sequentially formed with an axially extending third shaft section and a fourth shaft section, the second bearing is sleeved on the third shaft section, and the second nut for fixing the second bearing is spirally installed on the fourth shaft section, and the execution part of the lifting machine 5 is connected with the second bearing.

[0107] The lifting machine 5 applies the power of vertical movement to the movable roller 4 through the second bearing.

[0108] Further,

[0109] In the two embodiments of driving the movable roller 4 to ascend and descend, it is possible to realize the gripping, vertical lifting and releasing of the movable roller 4 by using only one power source, for example, the following embodiments.

[0110] As Figures 10-14 shown:

[0111] The lifting machine 5 comprises:

[0112] The supporting rod comprises a hinged part, a slide column and a supporting part connected in sequence, and the supporting part is used for supporting the end of the movable roller 4;

[0113] The driver has an execution part capable of vertical lifting and descending, the hinged part is hinged with the execution part of the driver, and the axis of the hinged part is parallel to the axis of the slide column;

[0114] The special-shaped sliding groove is vertically arranged and is in sliding connection with the slide column, and the special-shaped sliding groove is used for changing the horizontal distance between the slide column and the hinged part during the sliding of the slide column to make the supporting rod rotate around the hinged part, and during the ascending of the supporting rod, the supporting part is in contact with the end of the movable roller 4, and during the descending of the supporting rod, the supporting part is separated from the end of the movable roller 4.

[0115] Specifically,

[0116] The supporting rod is in the shape of a long rod, the hinged part is a round hole formed at one end of the supporting rod, the slide column is a cylindrical body formed at the middle end of the supporting rod, and the supporting part is a V-shaped rod body formed at the other end of the supporting rod.

[0117] The driver can be any one of a pneumatic cylinder, a hydraulic cylinder, an electric push rod, etc.

[0118] The special-shaped sliding groove is a vertical plate with a special-shaped groove formed on the surface.

[0119] The supporting rod rotates in two different directions during the ascending and descending, respectively, so that the supporting rod can lift the movable roller 4 to ascend or release the movable roller 4 to free fall.

[0120] In the above embodiment, when the end of the movable roller 4 is installed with the second bearing, the supporting part supports the second bearing.

[0121] Specifically,

[0122] The special-shaped sliding groove comprises:

[0123] The first sliding groove extends along the vertical direction, and when the sliding column is connected with the first sliding groove, the supporting part can support the end of the movable roller 4;

[0124] The second sliding groove is connected with the top end of the first sliding groove and extends downwardly in a direction inclined towards the execution part of the driver, and when the sliding column is connected with the second sliding groove, the supporting rod rotates around the hinge part to make the supporting part move away from the movement track of the movable roller 4;

[0125] The third sliding groove is connected with the bottom end of the second sliding groove and extends downwardly in a direction inclined towards the execution part of the driver, and the horizontal position of the hinge part is between the bottom end of the first sliding groove and the bottom end of the third sliding groove;

[0126] The fourth sliding groove is connected with the bottom end of the third sliding groove and extends downwardly in a direction inclined away from the execution part of the driver to the side of the bottom end of the first sliding groove, and the horizontal position of the hinge part is between the bottom end of the third sliding groove and the bottom end of the fourth sliding groove;

[0127] The fifth sliding groove is connected with the bottom end of the fourth sliding groove and the bottom end of the first sliding groove, and the fifth sliding groove extends upwardly in a direction inclined away from the execution part of the driver, and the top surface of the fifth sliding groove and the top surface of the fourth sliding groove are located in the same plane, and when the sliding column is connected with the fifth sliding groove, the supporting rod rotates around the hinge part to make the supporting part support the end of the movable roller 4.

[0128] The first sliding groove is designed such that when the sliding column is connected with the supporting part, the V-shaped top surface of the supporting part just supports the second bearing.

[0129] During the process that the driver drives the supporting rod to rise and make the sliding column close to the top end of the first sliding groove, the end of the movable roller 4 is always lifted by the supporting part, and before the film 3 is started, the supporting rod always stays in this position to make the movable roller 4 be lifted to the highest position.

[0130] At the same time when the film 3 is started, the driver continues to drive the supporting rod to rise, so that the sliding column moves to the top end of the first sliding groove, and then the supporting rod swings downwardly under the action of gravity, the sliding column slides into the second sliding groove, the supporting part is separated from the end of the movable roller 4, and the movable roller 4 starts free fall.

[0131] Then the driver drives the supporting rod to descend, and during the process that the supporting rod descends, the sliding column slides from the second sliding groove into the third sliding groove, and the supporting rod moves downwardly with the angle of the swing kept, so that the supporting part can avoid the end of the movable roller 4.

[0132] The driver continues to drive the supporting rod to descend until the sliding column slides from the third sliding groove to the bottom end of the fourth sliding groove, and the supporting rod performs the preparation posture of the swing.

[0133] At this time, the top surface of the special-shaped sliding groove above the sliding column is an inclined upward plane connecting the fourth sliding groove and the fifth sliding groove. When the driver drives the supporting rod to rise, the sliding column abuts against the plane and swings upward, so that the supporting part moves into the moving track of the end of the movable roller 4, and the supporting part can lift the end of the movable roller 4.

[0134] Further,

[0135] In the above embodiment, the driver needs to perform the action of driving the supporting rod to rise in steps, so when the air cylinder is used as the power source, the driver needs two air cylinders in series to perform the step action, resulting in an increase in the cost of the driver. If a servo cylinder is used, only one servo cylinder is needed to perform the action of driving the supporting rod to rise in two steps, but the price of the servo cylinder is high, and the two ends of the movable roller 4 need to be lifted synchronously, so two servo cylinders are needed.

[0136] In order to reduce the cost of the equipment, a low-cost driver structure is provided below.

[0137] The driver comprises:

[0138] A chain transmission mechanism, the chain of the chain transmission mechanism moves reciprocatingly along the vertical direction, and the chain of the chain transmission mechanism is hinged to the hinge part through an accessory;

[0139] A motor for driving the sprocket of the chain transmission mechanism to rotate.

[0140] The chain transmission mechanism and the special-shaped sliding groove are arranged on the same vertical plate, and one motor can drive two chain transmission mechanisms to work, so that the two supporting rods distributed at the two ends of the movable roller 4 can move along the two special-shaped sliding grooves.

[0141] The above embodiment is only an exemplary embodiment of the present application and is not used to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and such modifications or equivalent replacements are also regarded as falling within the protection scope of the present application.

Claims

1. An adaptive unwinding device for a gypsum board laminating machine, characterized in that, include: The unwinding roller (2) is rotatable about a horizontal axis and is used to mount the film roll (3). The movable roller (4) can rotate parallel to the unwinding roller (2) and has a vertical travel. The free end of the film (31) is transferred from the film winding (3) to the next station below the movable roller (4). The elevator (5) has an actuator that can lift and lower. The actuator of the elevator (5) is connected to the movable roller (4). Before the film roll (3) is activated, the elevator (5) lifts the movable roller (4) to the top of its own stroke. as well as: A brake is used to brake the unwinding roller (2) to rotate so as to passively unwind the film (3). When the film (3) is activated, the elevator (5) releases the lifting of the movable roller (4), so that the film (31) below the movable roller (4) is tensioned by the freely falling movable roller (4). The brake adjusts the braking torque of the unwinding roller (2) according to the position of the movable roller (4) so ​​that the movable roller (4) is kept at the middle of its stroke. or, The motor drives the unwinding roller (2) to rotate to actively unwind the film (3). When the film (3) is activated, the elevator (5) releases the lifting of the movable roller (4), so that the film (31) below the movable roller (4) is tensioned by the freely falling movable roller (4). The motor adjusts the rotation speed of the unwinding roller (2) according to the position of the movable roller (4) so ​​that the movable roller (4) is kept in the middle of its stroke. The hoist (5) includes: The support rod (51) includes a hinge (511), a slide (512) and a support (513) connected in sequence, the support (513) being used to support the end of the movable roller (4); The driver (52) has an actuator capable of vertical lifting, the hinge (511) is hinged to the actuator of the driver (52), and the axis of the hinge (511) is parallel to the axis of the slide (512). A shaped groove (53) is vertically arranged and slidably connected to the sliding column (512). The shaped groove (53) is used to change the horizontal distance between the sliding column (512) and the hinge (511) during the sliding process of the sliding column (512) so that the support rod (51) rotates around the hinge (511). During the upward movement of the support rod (51), the supporting part (513) contacts the end of the movable roller (4). During the downward movement of the support rod (51), the supporting part (513) separates from the end of the movable roller (4).

2. The adaptive unwinding device for a gypsum board laminating machine according to claim 1, characterized in that, A fixed roller (6) is provided on the side of the movable roller (4) away from the unwinding roller (2). The fixed roller (6) is parallel to the unwinding roller (2). The height of the fixed roller (6) is not lower than the maximum height of the unwinding roller (2). The film (31) released by the film roll (3) is transmitted sequentially through the movable roller (4) and the fixed roller (6).

3. The adaptive unwinding device for a gypsum board laminating machine according to claim 1, characterized in that, The movable roller (4) is slidably connected to the frame and the sliding direction is vertical. The elevator (5) is used to drive the movable roller (4) to move vertically up and down.

4. The adaptive unwinding device for a gypsum board laminating machine according to claim 3, characterized in that, The end of the movable roller (4) is sequentially formed with an axially extending first shaft section (41) and a second shaft section (43). A first bearing (42) is sleeved on the first shaft section (41), and a first nut (44) for fixing the first bearing (42) is screwed on the second shaft section (43). The movable roller (4) is connected to the frame via a slide table, which includes: The slide rail (13) is vertically mounted on the frame; Two end caps (15) are provided and are symmetrical to each other. The two end caps (15) are fastened together to form a slider (14) for fitting the first bearing (42) and slidingly connecting the slide rail (13).

5. The adaptive unwinding device for a gypsum board laminating machine according to claim 4, characterized in that, The end of the second shaft segment (43) is sequentially formed with an axially extending third shaft segment (45) and a fourth shaft segment (47). A second bearing (46) is sleeved on the third shaft segment (45), and a second nut (48) for fixing the second bearing (46) is screwed on the fourth shaft segment (47). The actuator of the hoist (5) is connected to the second bearing (46).

6. The adaptive unwinding device for a gypsum board laminating machine according to claim 1, characterized in that, The irregularly shaped groove (53) includes: The first slide groove (531) extends vertically. When the slide column (512) is connected to the first slide groove (531), the support part (513) can support the end of the movable roller (4). The second slide (532) is connected to the top of the first slide (531) and extends downward at an angle toward the actuator of the driver (52). When the slide column (512) is connected to the second slide (532), the support rod (51) rotates around the hinge (511) so that the support part (513) moves away from the movement trajectory of the movable roller (4). The third slide (533) is connected to the bottom end of the second slide (532) and extends downward at an angle toward the actuator of the driver (52). The horizontal position of the hinge (511) is located between the bottom end of the first slide (531) and the bottom end of the third slide (533). The fourth slide (534) connects to the bottom end of the third slide (533) and extends downward at an angle away from the actuator of the driver (52) to the side of the bottom end of the first slide (531). The horizontal position of the hinge (511) is located between the bottom end of the third slide (533) and the bottom end of the fourth slide (534). The fifth slide (535) connects the bottom end of the fourth slide (534) and the bottom end of the first slide (531). The fifth slide (535) extends upward at an angle away from the actuator of the driver (52). The top surface of the fifth slide (535) and the top surface of the fourth slide (534) are located on the same plane. When the slide column (512) is connected to the fifth slide (535), the support rod (51) rotates around the hinge (511) so that the support part (513) can support the end of the movable roller (4).

7. The adaptive unwinding device for a gypsum board laminating machine according to claim 6, characterized in that, The driver (52) includes: Chain drive mechanism (521), the chain of the chain drive mechanism (521) moves back and forth in a vertical direction, and the chain of the chain drive mechanism (521) is hinged to the hinge part (511) through an attachment; An electric motor (522) is used to drive the sprocket of the chain drive mechanism (521) to rotate.

8. The adaptive unwinding device for a gypsum board laminating machine according to claim 1, characterized in that, The movable roller (4) is rotatably connected to the frame via a swing arm (7), and the axis of rotation of the swing arm (7) is set horizontally. The elevator (5) is used to drive the movable roller (4) to perform circular motion around the swing axis of the swing arm (7).

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